72012

Appears in sequences

• Quadrinomial coefficients.at n=15A005720
• Numbers n such that sopf(n) = sopf(n-1) - sopf(n-2), where sopf(x) = sum of the distinct prime factors of x.at n=14A076527
• Consider the base-7 Kaprekar map n->K(n) defined in A165071. Sequence gives numbers belonging to cycles, including fixed points.at n=12A165076
• Consider the base-7 Kaprekar map n->K(n) defined in A165071. Sequence gives numbers belonging to cycles of length greater than 1.at n=11A165078
• Decimal representation of the middle column of the "Rule 75" elementary cellular automaton starting with a single ON (black) cell.at n=16A266897